Solve any equation forward or backward—click any variable to make it the target with automatic SI unit conversions.
Bidirectionally solve V = I × R for electrical potential difference (voltage), circuit current, or ohmic resistance.
Solve P = V × I for electrical power in Watts, circuit voltage in Volts, or current draw in Amperes.
Solve E_k = ½mv² for translational kinetic energy, moving mass, or required velocity.
Solve U = m × g × h for gravitational potential energy, object mass, gravitational acceleration, or elevation height.
Solve F = m × a for net force in Newtons, inertial mass in kilograms, or linear acceleration in m/s².
Solve F = G × m₁ × m₂ / r² for gravitational attraction force, celestial masses, or orbital separation distance.
Solve PV = nRT for absolute gas pressure, container volume, molar quantity, or absolute temperature in Kelvin.
Solve the universal wave equation v = f × λ for phase propagation velocity, wave frequency, or wavelength.
Solve for observed Doppler-shifted frequency, emitted source frequency, source velocity, or observer velocity.
Solve n₁ sin(θ₁) = n₂ sin(θ₂) for angle of refraction, angle of incidence, or refractive indices of optical media.
Solve F_c = m × v² / r for radial centripetal force, rotating mass, tangential velocity, or turn radius.
Solve Hooke's Law F = k × x for linear elastic restoring force, spring rate constant, or linear deflection.
Solve p = m × v for translational momentum in kg·m/s, object mass, or velocity.
Solve W = F × d × cos(θ) for mechanical work in Joules, applied force, displacement distance, or force angle.
Solve ΔL = α × L₀ × ΔT for thermal length change, coefficient of thermal expansion, initial length, or temperature delta.
Solve Q = (k × A × ΔT) / L for conductive heat transfer rate in Watts, thermal conductivity, surface area, temperature difference, or wall thickness.
Solve Einstein's Lorentz time dilation Δt = Δt₀ / √(1 - β²) for dilated observer time, proper rest time, or fraction of light speed β = v/c.
Solve v_e = √(2GM / R) for planetary escape speed, celestial body mass, or starting orbital radius.
Solve P = ε × σ × A × T⁴ for radiative thermal power, surface emissivity, radiating area, or absolute temperature in Kelvin.
Solve F = k_e × q₁ × q₂ / r² for electrostatic force between point charges, charge magnitudes in microcoulombs, or separation distance.
Solve E = h × f for photon energy in electron-volts (eV), electromagnetic wave frequency in THz, or Planck constant scaling.
Solve N(t) = N₀ × (0.5)^(t / t_½) for remaining quantity, initial sample quantity, elapsed time, or isotope half-life.